Federal Register / Vol. 63, No. 129 /Tuesday, July 7, 1998 /Rules and Regulations 36549

PART 620—DISCLOSURE TO

SHAREHOLDERS

6. The authority citation for part 620

continues to read as follows:

Authority: Secs. 5.17, 5.19, 8.11 of the

Farm Credit Act (12 U.S.C. 2252, 2254,

2279aa–11); sec. 424 of Pub. L. 100–233, 101

Stat. 1568, 1656.

Subpart B—Annual Report to

Shareholders

§ 620.5 [Amended]

7. Section 620.5 is amended by

removing the word ‘‘financial’’ and

adding in its place the word

‘‘financing’’; and by removing the words

‘‘, as defined in § 614.4540(e) of this

chapter’’ in paragraph (a)(8).

PART 630—DISCLOSURE TO

INVESTORS IN SYSTEMWIDE AND

CONSOLIDATED BANK DEBT

OBLIGATIONS OF THE FARM CREDIT

SYSTEM

8. The authority citation for part 630

continues to read as follows:

Authority: Secs. 5.17, 5.19 of the Farm

Credit Act (12 U.S.C. 2252, 2254).

Subpart B—Annual Report to Investors

§ 630.20 [Amended]

9. Section 630.20 is amended by

removing the words ‘‘, as defined in

§ 614.4540(e) of this chapter’’ in

paragraph (a)(1)(v).

Dated: June 26, 1998.

Floyd Fithian,

Secretary, Farm Credit Administration Board.

[FR Doc. 98–17844 Filed 7–6–98; 8:45 am]

BILLING CODE 6705–01–P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98–NM–155–AD; Amendment

39–10643; AD 98–14–10]

RIN 2120–AA64

Airworthiness Directives; Boeing

Model 747–400, 757, 767, and 777

Series Airplanes Equipped with

AlliedSignal RIA–35B Instrument

Landing System Receivers

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Final rule; request for

comments.

SUMMARY: This amendment adopts a

new airworthiness directive (AD) that is

applicable to certain Boeing Model 747–

400, 757, 767, and 777 series airplanes.

This action requires a revision to the

Airplane Flight Manual (AFM) to

prohibit certain types of approaches if

only one instrument landing system

(ILS) receiver is operational. This action

also requires repetitive inspections to

detect certain faults of all RIA–35B ILS

receivers, and replacement of discrepant

ILS receivers with new, serviceable, or

modified units; or, alternatively, an

additional revision to the AFM and

installation of a placard to prohibit

certain operations. This AD also

provides for optional terminating action

for the AFM revisions and repetitive

inspections. This amendment is

prompted by a report of errors in the

glide slope deviation provided by an ILS

receiver. The actions specified in this

AD are intended to detect and correct

faulty ILS receivers, and to ensure that

the flightcrew is advised of the potential

hazard of performing ILS approaches

using a localizer deviation from a faulty

ILS receiver and also advised of the

procedures necessary to address that

hazard. Erroneous localizer deviation

could result in a landing outside the

lateral boundary of the runway.

DATES: Effective July 22, 1998.

The incorporation by reference of

certain publications listed in the

regulations is approved by the Director

of the Federal Register as of July 22,

1998.

Comments for inclusion in the Rules

Docket must be received on or before

September 8, 1998.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–114,

Attention: Rules Docket No. 98–NM–

155–AD, 1601 Lind Avenue, SW.,

Renton, Washington 98055–4056.

The service information referenced in

this AD may be obtained from

AlliedSignal Aerospace, Technical

Publications, Dept. 65–70, P.O. Box

52170, Phoenix, Arizona 85072–2170.

This information may be examined at

the FAA, Transport Airplane

Directorate, 1601 Lind Avenue, SW.,

Renton, Washington; or at the Office of

the Federal Register, 800 North Capitol

Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Jay

Yi, Aerospace Engineer, Systems and

Equipment Branch, ANM–130S, FAA,

Transport Airplane Directorate, Seattle

Aircraft Certification Office, 1601 Lind

Avenue, SW., Renton, Washington

98055–4056; telephone (425) 227–1013;

fax (425) 227–1181.

SUPPLEMENTARY INFORMATION: The FAA

has received a report indicating that,

during a test flight of a Boeing airplane,

the flightcrew detected discrepancies in

the glide slope deviation provided by

one of the onboard Instrument Landing

System (ILS) receivers. (The glide slope

is the flight path that an airplane is to

follow when making an ILS landing.

The display of the glide slope deviation

indicates the position of the airplane

relative to the glide slope and indicates

to the flightcrew whether the airplane

needs to be at a higher or lower altitude

to be on the normal approach flight

path.) The discrepancies in the glide

slope deviation provided by the

discrepant ILS receiver resulted in the

display showing that the airplane was

on the glide slope, when the airplane

was approximately one dot low on the

glide slope (as determined from the data

provided by the ILS receivers that were

operating correctly). The flightcrew

received no annunciation that there

were discrepancies between the glide

slope deviations being provided by the

ILS receivers.

An investigation conducted by

AlliedSignal, the manufacturer of the

RIA–35B ILS receivers installed on the

airplane, has revealed that the

discrepancies in the glide slope

deviation were caused by failure of an

internal component of the ILS receiver

due to that component’s sensitivity to

temperature. Due to the nature of the

failure, that component also could fail

on other airplanes.

The same ILS receiver provides

localizer deviation. (The display of the

localizer deviation indicates the

position of the airplane relative to the

center line of the runway during an ILS

landing.) Faults in the ILS receiver, if

not corrected, could result in a landing

outside the lateral boundary of the

runway. If a faulty ILS receiver provides

a localizer deviation that contains errors

that are not detected by the flightcrew,

use of a single ILS receiver for ILS or

localizer approaches could result in the

pilot being directed to land the airplane

outside the lateral boundary of the

runway. If the localizer deviations

generated by two of the ILS receivers

onboard the airplane contain errors that

are not detected by the flightcrew,

during category II and III operations, the

autopilot system may land the airplane

outside the lateral boundary of the

runway.

The FAA finds that flightcrews are

not currently provided with adequate

information necessary to address the

potential hazard of performing an ILS or

localizer approach using a localizer

deviation provided by a faulty ILS

receiver. Therefore, the FAA has

determined that flightcrews must be

provided with such information and

must be made aware that certain types
36550 Federal Register / Vol. 63, No. 129 /Tuesday, July 7, 1998 /Rules and Regulations

of operations are prohibited when only

one RIA–35B ILS receiver (with the

affected part number) is operational.

The RIA–35B ILS receivers installed

on certain Boeing Model 747–400, 757,

767, and 777 series airplanes are the

same type as those on the affected

Boeing airplane. Therefore, those Boeing

Model 747–400, 757, 767, and 777 series

airplanes may be subject to the same

unsafe condition.

Explanation of Relevant Service

Information

The FAA has reviewed and approved

AlliedSignal Electronic and Avionics

Systems Service Bulletin M–4426 (RIA–

35B–34–6), Revision 3, dated May 1998,

which describes procedures for

modifying RIA–35B ILS receivers, part

number (P/N) 066–50006–0101. The

modification includes removing the

radio frequency (RF) assembly;

modifying the RF module by cutting two

solder-side tracks, installing two 221–

ohm resistors, and replacing

components U8009 and U8206; and

reinstalling the modified RF assembly.

Once modified, the P/N of the ILS

receiver is converted to 066–50006–

1101. Accomplishment of the actions

specified in the service bulletin is

intended to adequately address the

identified unsafe condition.

Explanation of the Requirements of the

Rule

Since an unsafe condition has been

identified that is likely to exist or

develop on other airplanes of the same

type design, this AD is being issued to

detect and correct faulty ILS receivers,

and to ensure that the flightcrew is

advised of the potential hazard of

performing ILS approaches using a

localizer deviation from a faulty ILS

receiver and also advised of the

procedures necessary to address that

hazard. This AD requires a revision to

the Limitations Section of the FAAapproved Airplane Flight Manual

(AFM) to prohibit ILS or localizer

approaches if only one ILS receiver is

operational. This AD also requires

repetitive visual inspections for faults

stored in the internal fault memory of

all RIA–35B ILS receivers, P/N 066–

50006–0101; or, alternatively, an

additional revision to the Limitations

Section of the AFM and installation of

a placard in the cockpit to prohibit

category II and III operations. For cases

where certain faults are detected in the

internal fault memory, this AD also

requires replacement of the faulty ILS

receiver with a new, serviceable, or

modified part. If accomplished,

replacement of all ILS receivers, P/N

066–50006–0101, with modified ILS

receivers terminates the repetitive

inspections and AFM revisions

described previously.

Explanation of the Applicability of the

Rule

The FAA may consider separate

rulemaking to address the identified

unsafe condition on other transport

category airplanes equipped with the

affected ILS receiver. The FAA notes

that its general policy is that, when an

unsafe condition results from the

installation of an appliance or other

item that is installed in a limited

number of airplane models, an AD is

issued so that it is applicable to those

airplanes, rather than the item. The

reason for this is simple: making the AD

applicable to the airplane models on

which the item is installed ensures that

operators of those airplanes will be

notified directly of the unsafe condition

and the action required to correct it.

While it is assumed that an operator

will know the models of airplanes that

it operates, there is a potential that the

operator will not know or be aware of

specific items that are installed on its

airplanes. Therefore, calling out the

airplane model as the subject of the AD

prevents ‘‘unknowing non-compliance’’

on the part of the operator.

Interim Action

This is considered to be interim

action. The FAA is considering further

rulemaking action to supersede this AD

to require replacement of all existing

RIA–35B ILS receivers with modified

parts. However, the planned compliance

time for such replacement is sufficiently

long so that notice and opportunity for

prior public comment will be

practicable.

Determination of Rule’s Effective Date

Since a situation exists that requires

the immediate adoption of this

regulation, it is found that notice and

opportunity for prior public comment

hereon are impracticable, and that good

cause exists for making this amendment

effective in less than 30 days.

Comments Invited

Although this action is in the form of

a final rule that involves requirements

affecting flight safety and, thus, was not

preceded by notice and an opportunity

for public comment, comments are

invited on this rule. Interested persons

are invited to comment on this rule by

submitting such written data, views, or

arguments as they may desire.

Communications shall identify the

Rules Docket number and be submitted

in triplicate to the address specified

under the caption ADDRESSES. All

communications received on or before

the closing date for comments will be

considered, and this rule may be

amended in light of the comments

received. Factual information that

supports the commenter’s ideas and

suggestions is extremely helpful in

evaluating the effectiveness of the AD

action and determining whether

additional rulemaking action would be

needed.

Comments are specifically invited on

the overall regulatory, economic,

environmental, and energy aspects of

the rule that might suggest a need to

modify the rule. All comments

submitted will be available, both before

and after the closing date for comments,

in the Rules Docket for examination by

interested persons. A report that

summarizes each FAA-public contact

concerned with the substance of this AD

will be filed in the Rules Docket.

Commenters wishing the FAA to

acknowledge receipt of their comments

submitted in response to this rule must

submit a self-addressed, stamped

postcard on which the following

statement is made: ‘‘Comments to

Docket Number 98–NM–155–AD.’’ The

postcard will be date stamped and

returned to the commenter.

Regulatory Impact

The regulations adopted herein will

not have substantial direct effects on the

States, on the relationship between the

national government and the States, or

on the distribution of power and

responsibilities among the various

levels of government. Therefore, in

accordance with Executive Order 12612,

it is determined that this final rule does

not have sufficient federalism

implications to warrant the preparation

of a Federalism Assessment.

The FAA has determined that this

regulation is an emergency regulation

that must be issued immediately to

correct an unsafe condition in aircraft,

and that it is not a ‘‘significant

regulatory action’’ under Executive

Order 12866. It has been determined

further that this action involves an

emergency regulation under DOT

Regulatory Policies and Procedures (44

FR 11034, February 26, 1979). If it is

determined that this emergency

regulation otherwise would be

significant under DOT Regulatory

Policies and Procedures, a final

regulatory evaluation will be prepared

and placed in the Rules Docket. A copy

of it, if filed, may be obtained from the

Rules Docket at the location provided

under the caption ADDRESSES.
Federal Register / Vol. 63, No. 129 /Tuesday, July 7, 1998 /Rules and Regulations 36551

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation

safety, Incorporation by reference,

Safety.

Adoption of the Amendment

Accordingly, pursuant to the

authority delegated to me by the

Administrator, the Federal Aviation

Administration amends part 39 of the

Federal Aviation Regulations (14 CFR

part 39) as follows:

PART 39—AIRWORTHINESS

DIRECTIVES

1. The authority citation for part 39

continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

98–14–10 Boeing: Amendment 39–10643.

Docket 98–NM–155–AD.

Applicability: Model 747–400, 757, 767,

and 777 series airplanes; equipped with

AlliedSignal RIA–35B Instrument Landing

System (ILS) receivers, part number (P/N)

066–50006–0101; certificated in any

category.

Note 1: This AD applies to each airplane

identified in the preceding applicability

provision, regardless of whether it has been

modified, altered, or repaired in the area

subject to the requirements of this AD. For

airplanes that have been modified, altered, or

repaired so that the performance of the

requirements of this AD is affected, the

owner/operator must request approval for an

alternative method of compliance in

accordance with paragraph (e) of this AD.

The request should include an assessment of

the effect of the modification, alteration, or

repair on the unsafe condition addressed by

this AD; and, if the unsafe condition has not

been eliminated, the request should include

specific proposed actions to address it.

Compliance: Required as indicated, unless

accomplished previously.

To detect and correct faulty ILS receivers,

and to ensure that the flightcrew is advised

of the potential hazard of performing ILS

approaches using a localizer deviation from

a faulty ILS receiver and also advised of the

procedures necessary to address that hazard,

accomplish the following:

(a) Within 10 days after the effective date

of this AD, revise the Limitations Section of

the FAA-approved Airplane Flight Manual

(AFM) to include the following statement.

This may be accomplished by inserting a

copy of this AD into the AFM.

Any Instrument Landing System (ILS) or

Localizer approach with only one operative

AlliedSignal ILS receiver, P/N 066–50006–

0101, installed is prohibited.

Note 2: On Model 747–400 and 777 series

airplanes, the existence of only one operative

ILS receiver is indicated by the Engine

Indication and Crew Alerting System

advisory message, ‘‘SNGL SOURCE ILS.’’ On

Model 757 and 767 series airplanes, failure

of an ILS receiver is indicated by an ILS flag

on the display of the Electronic Flight

Instrument System when approach mode is

selected.

(b) Within 30 days after the effective date

of this AD, accomplish the requirements of

either paragraph (b)(1) or (b)(2) of this AD.

(1) Perform a visual inspection of the 64

flight legs of the internal fault memory of all

AlliedSignal RIA–35B ILS receivers, P/N

066–50006–0101, for fault codes ‘‘Nl’’ (glide

slope antialias fault) or ‘‘Nm’’ (localizer

antialias fault). Repeat the inspection

thereafter at intervals not to exceed 64 flight

cycles. If any fault code ‘‘Nl’’ or ‘‘Nm’’ is

found, prior to further flight, replace the

existing ILS receiver with a new or

serviceable ILS receiver having the same P/

N; or with an ILS receiver that has been

modified to P/N 066–50006–1101 in

accordance with AlliedSignal Electronic and

Avionics Systems Service Bulletin M–4426

(RIA–35B–34–6), Revision 3, dated May

1998. Installation of an ILS receiver that has

been modified (and the P/N converted) in

accordance with the service bulletin

constitutes terminating action for the

inspection requirement of paragraph (b)(1) of

this AD for that part.

(2) Accomplish the actions required by

paragraphs (b)(2)(i) and (b)(2)(ii) of this AD.

(i) Revise the Limitations Section of the

FAA-approved AFM to include the following

statement. This may be accomplished by

inserting a copy of this AD into the AFM.

Category II and III operations are

prohibited with AlliedSignal ILS receiver P/

N 066–50006–0101 installed.

(ii) Install a placard on the forward

instrument panel of the cockpit in clear view

of the pilots, which states:

‘‘Category II and III operations are

prohibited.’’

(c) Replacement of all existing RIA–35B

ILS receivers, P/N 066–50006–0101, with

RIA–35B ILS receivers that have been

modified in accordance with AlliedSignal

Electronic and Avionics Systems Service

Bulletin M–4426 (RIA–35B–34–6), Revision

3, dated May 1998; and that have had their

P/N’s converted to 066–50006–1101;

constitutes terminating action for the

requirements of this AD. After the

replacement has been accomplished, the

AFM limitations required by paragraphs (a)

and (b)(2)(i) of this AD may be removed from

the AFM, and the placard required by

(b)(2)(ii) may be removed from the cockpit.

Note 3: Modification of all AlliedSignal

RIA–35B ILS receivers, P/N 066–50006–0101,

prior to the effective date of this AD in

accordance with AlliedSignal Electronic and

Avionics Systems Service Bulletin M–4426

(RIA–35B–34–6), dated December 1997;

Revision 1, dated January 1998; or Revision

2, dated April 1998; is considered acceptable

for compliance with the applicable action

specified in this amendment.

(d) As of the effective date of this AD, no

person shall install on any airplane an RIA–

35B ILS receiver, P/N 066–50006–0101, that

has been found to be discrepant (that is, on

which fault codes ‘‘Nl’’ or ‘‘Nm’’ were found

during an inspection of the internal fault

memory) unless the discrepancy has been

corrected by modifying the ILS receiver in

accordance with AlliedSignal Electronic and

Avionics Systems Service Bulletin M–4426

(RIA–35B–34–6), Revision 3, dated May

1998.

(e) An alternative method of compliance or

adjustment of the compliance time that

provides an acceptable level of safety may be

used if approved by the Manager, Seattle

Aircraft Certification Office (ACO), FAA,

Transport Airplane Directorate. Operators

shall submit their requests through an

appropriate FAA Principal Maintenance

Inspector, who may add comments and then

send it to the Manager, Seattle ACO.

Note 4: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Seattle ACO.

(f) Special flight permits may be issued in

accordance with §§ 21.197 and 21.199 of the

Federal Aviation Regulations (14 CFR 21.197

and 21.199) to operate the airplane to a

location where the requirements of this AD

can be accomplished.

(g) The modification, if accomplished,

shall be done in accordance with

AlliedSignal Electronic and Avionics

Systems Service Bulletin M–4426 (RIA–35B–

34–6), Revision 3, dated May 1998. This

incorporation by reference was approved by

the Director of the Federal Register in

accordance with 5 U.S.C. 552(a) and 1 CFR

part 51. Copies may be obtained from

AlliedSignal Aerospace, Technical

Publications, Dept. 65–70, P.O. Box 52170,

Phoenix, Arizona 85072–2170. Copies may

be inspected at the FAA, Transport Airplane

Directorate, 1601 Lind Avenue, SW., Renton,

Washington; or at the Office of the Federal

Register, 800 North Capitol Street, NW., suite

700, Washington, DC.

(h) This amendment becomes effective on

July 22, 1998.

Issued in Renton, Washington, on June 29,

1998.

Vi L. Lipski,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 98–17914 Filed 7–6–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97–NM–139–AD; Amendment

39–10648; AD 98–14–15]

RIN 2120–AA64

Airworthiness Directives; Fokker

Model F27 Mark 100, 200, 300, 400, 500,

600, and 700 Series Airplanes, and

Model F27 Mark 050 Series Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Final rule.